Cotyledon (0.5 cm) and hypocotyl (1.0 cm) explants were excised from 5-7 days old in vitro grown seedlings and cultivated in Petri dishes on basal medium MS0 containing 3.0 mgL-1 BA, 0.3 mgL-1 IAA, 0.3 mgL-1 GA3, (as a control) and four variant of MS0 different in concentration of basal medium: